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Lossy or Lossless? Please use this forum to post spectral and frequency analysis posts about shows you have your doubts about.

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  #61  
Old 2011-02-08, 07:08 PM
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Re: Spotting Lossy Sources--links inside

Quote:
Originally Posted by zootype View Post
Re: Spotting Lossy Sources--links inside

--------------------------------------------------------------------------------

Quote:
Originally Posted by pissah
Hello! has anybody had trouble with Trader's Little Helper's tool for checking for lossy files?
I have taped a few things straight to WAV, then after a bit of tweaking and EQing I often get a "source cannot be specified" or even "looks like MP3"
I KNOW there was no mp3 in the lineage so what's up with that??




So what exactly can this thread tell us about determining whether or not an upload would be acceptable here, re: lossy or lossless?
Not much, apparently.
OK I'll try to be less cranky and figure out this here spectrum anal thing
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  #62  
Old 2014-01-15, 05:58 AM
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Re: Spotting Lossy Sources--links inside

AS mentioned in another thread, it is possible to fool all of you by using harmonic synthesis to restore the missing high end. I've tried this, showed it to one of my MQR labelmates who is skilled at reading spectrals, and he couldn't tell the difference. Neither could TLH (CDDA 100%). Add tape noise like the Zappateers do? Amateurs. Just restore the high end with harmonic synthesis and no one will be the wiser.

This is all hypothetical. I'd never do that and circulate it. Just making a point that there's no foolproof way to tell the difference.
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  #63  
Old 2014-03-05, 02:39 PM
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Re: Spotting Lossy Sources--links inside

Another neat program for spectral analysis is Sonic Visualiser.

http://www.sonicvisualiser.org/

It's free and open source.

With some tweaking its built-in spectrogram functionality is almost as good as that of CoolEdit Pro / Audition, even though it is not quite as customizable (color presets not editable, no dynamic range adjustment, no gamma adjustment)

The program is extensible through plugins, though I haven't tested any of those. Yet. <insert maniacal laughter here>

I've attached a Session Template to this post with settings I find to be suitable for source analysis. Extract it to %userprofile%\.Sonic Visualiser\templates and load it via File->Apply Session Template->Waveform and per-channel Spectrograms
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Attached Files
File Type: zip Waveform and per-channel Spectrograms.zip
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  #64  
Old 2020-02-26, 06:05 PM
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Re: Spotting Lossy Sources--links inside **2020 UPDATES**

its amazing I'll have to try but not as crisp as spek

I recently discovered this software, it is so great for spectral analysis try it out. it generates the screencaps and everything.

I would call it essential ttd software
http://spek.cc/
Quote:
Originally Posted by spek.com
Spek – Acoustic Spectrum Analyser

Spek (IPA: /spɛk/, ‘bacon’ in Dutch) helps to analyse your audio files by showing their spectrogram. Spek is free software available for Unix, Windows and Mac OS X.
Features
  • Supports all popular lossy and lossless audio file formats thanks to the FFmpeg libraries.
  • Ultra-fast signal processing, uses multiple threads to further speed up the analysis.
  • Shows the codec name and the audio signal parameters.
  • Allows to save the spectrogram as an image file.
  • Drag-and-drop support; associates with common audio file formats.
  • Auto-fitting time, frequency and spectral density rulers.
  • Adjustable spectral density range.
  • Translated into 19 languages.
Screenshots
Spek running under Ubuntu Linux Spek running under Windows 7 Spek running under Mac OS X

Download
Unix spek-0.8.2.tar.xz (168 KiB)
instructions
manual

Windows spek-0.8.2.msi (8.47 MiB)
spek-0.8.2.zip (8.35 MiB)
instructions

Mac OS X spek-0.8.3.dmg (6.03 MiB)
instructions
News news feed
  • 2014-08-31: Faster Fast Fourier Transform
  • 2012-09-23: Spek 0.8.0 Released
  • 2011-08-17: Spek and Lion
  • 2011-04-24: Spek 0.7 Released
  • 2011-03-16: Spek status update

Contribute

Spek is free and open source software licensed under GPLv3. The project is written in C++, the code is available on GitHub.

Report bugs and request new features on the issue tracker.
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File Type: png win7.png
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File Type: png osx.png
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shntool tlh eac foobar2000 spek audacity cdwave vlc

Quote:
Originally posted by oxymoron
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  #65  
Old 2020-03-16, 01:39 PM
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Re: Spotting Lossy Sources--links inside **2020 UPDATES**

added DARU/SPECTRUM-ANALYZER!

it is actually for what we call 'frequency analysis'

download link and instructions in this thread:
http://www.thetradersden.org/forums/...d.php?t=157853

Quote:
Originally Posted by DULL
--------------------------------------------------------------------------------

Who is this software?

Spectrum analyzer compatible with WAV / MP3 / WMA / OGG / FLAC and high resolution (192KHz / 24,32bit)

Analyzes and displays audio frequency bands using FFT (Fast Fourier Transform).

It has the following features.

File size can be analyzed up to 2GB in linear PCM.
A large file can be analyzed in small units.
Sampling rate is unlimited if it is over 8000Hz.
The number of quantization bits corresponds to the integers 8, 16, 24, 32 bits and the decimal number 32 bits.
Real-time analysis from a recording device is possible.
Multi-channel files can be analyzed.
Reading of WAVE file of business software is also possible. (BWF chunk compatible)
Frequency analysis results can be switched between logarithmic and linear.

* It does not support compressed WAV files that require the ACM codec.

--------------------------------------------------------------------------------
__________________
Checksums Demystified | ask for help in Technobabble

thetradersden.org | ttd recommended free software/freeware webring
shntool tlh eac foobar2000 spek audacity cdwave vlc

Quote:
Originally posted by oxymoron
Here you are in a place of permanent madness, be careful!
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